Defending Indiana's Wild Places Since Day One
The Hoosier Chapter fights for clean air, clean water, and the natural landscapes that make Indiana worth protecting.
The Hoosier Chapter fights for clean air, clean water, and the natural landscapes that make Indiana worth protecting.
The Sierra Club Hoosier Chapter is Indiana's frontline voice for environmental advocacy, rooted right here in Indianapolis and reaching every corner of the state. From the dunes of Lake Michigan to the limestone hills of the south, this chapter organizes Hoosiers around the issues that shape the land, water, and air they depend on every day.
The work is grassroots and deliberate: local volunteers, policy advocates, and community partners pushing back against pollution, habitat loss, and the rollback of environmental protections. The chapter connects members to legislative campaigns, public land defense, and outdoor outings that remind people exactly what is worth fighting for.
Based at 1100 W 42nd St in Indianapolis, the Hoosier Chapter is part of the largest and most influential grassroots environmental organization in the country. Joining means adding your name and your energy to decades of wins for Indiana's rivers, forests, and neighborhoods.
The Hoosier Chapter runs on member engagement. Advocacy programs connect volunteers directly with state and local decision-makers, turning community concern into legislative pressure on issues like clean energy transition, coal ash cleanup, and public lands access.
Outdoor outings bring members into the landscapes the chapter defends, from hikes through Hoosier National Forest to paddling trips on Indiana waterways. Environmental education programs and community events build the informed, active base that makes long-term policy change possible.
Membership also plugs you into the broader Sierra Club network, amplifying Indiana voices on national campaigns while keeping the focus local. Whether you show up to a chapter meeting, join a letter-writing push, or just renew your membership, every action counts toward a healthier Indiana.
The Hoosier Chapter focuses on state and local environmental advocacy, including clean energy policy, protecting public lands, fighting pollution, and engaging Hoosiers through outdoor programs and community organizing.
You can become a Sierra Club member, attend chapter events and outings, volunteer for advocacy campaigns, or connect with the chapter at 1100 W 42nd St in Indianapolis to learn what opportunities are available.
Not at all. The chapter welcomes people at every level, from longtime activists to first-time volunteers. If you care about Indiana's environment, there is a place for you here.
Both. The Hoosier Chapter runs outdoor outings including hikes and paddling trips alongside its policy and advocacy work. Getting outside is a core part of the Sierra Club's mission.
The chapter is based at 1100 W 42nd St, Indianapolis, IN 46208.
Sierra Club membership supports both the national organization and your local chapter. The Hoosier Chapter receives a portion of dues to fund Indiana-specific campaigns and programs.
The chapter works on a range of Indiana issues including clean energy transition, coal ash pollution, public land protection, clean water, and building community resilience against environmental harm. Priorities shift with legislative sessions and emerging threats.
Ready to get started? Contact us today!
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